/* =========================================================================
 * 深见 AuNC-PPI AI 平台 · 共享样式系统
 * 四套配色方案（scheme-a/b/c/d）共用一套组件，仅切换 token
 * ========================================================================= */

/* ============================ 1. 设计令牌 ============================ */
:root {
  --f: "Inter", "SF Pro Display", "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
  --fnum: "SF Mono", "JetBrains Mono", "Cascadia Mono", Consolas, ui-monospace, monospace;

  --r-xs: 6px; --r-sm: 10px; --r: 14px; --r-lg: 20px; --r-xl: 28px;
  --sp1: 4px; --sp2: 8px; --sp3: 12px; --sp4: 16px; --sp5: 24px;
  --sp6: 32px; --sp7: 48px; --sp8: 64px; --sp9: 88px;

  --maxw: 1320px;
  --ash: 0 1px 2px rgba(8, 12, 28, .06), 0 8px 24px -12px rgba(8, 12, 28, .16);
  --ash-lg: 0 2px 4px rgba(8, 12, 28, .06), 0 24px 60px -24px rgba(8, 12, 28, .28);
  --agl: 0 0 0 1px rgba(255, 255, 255, .06), 0 24px 70px -28px rgba(233, 193, 88, .5);
}

/* ---- 方案 A：深空智算（dark gold/teal） ---- */
[data-scheme="a"] {
  --bg: #070B16; --bg2: #0A1020; --panel: rgba(255, 255, 255, .035);
  --panel2: rgba(255, 255, 255, .06); --line: rgba(255, 255, 255, .10);
  --line2: rgba(255, 255, 255, .18);
  --fg: #EEF3FF; --fg2: #C3CCE2; --muted: #7E8AA6; --muted2: #5C6784;
  --acc: #E9C158; --acc2: #FFE9A8; --acc-soft: rgba(233, 193, 88, .14);
  --acc2c: #2FD3C0; --acc2-soft: rgba(47, 211, 192, .13);
  --warn: #FF9A5A; --ok: #4ADE9B; --bad: #FF6B7A;
  --glow: radial-gradient(900px 460px at 12% -6%, rgba(233, 193, 88, .16), transparent 62%),
          radial-gradient(760px 420px at 92% 4%, rgba(47, 211, 192, .13), transparent 60%);
  --card-bg: linear-gradient(168deg, rgba(255, 255, 255, .055), rgba(255, 255, 255, .018));
  --head-bg: rgba(7, 11, 22, .72);
  --tag: rgba(233, 193, 88, .12);
}

/* ---- 方案 B：商业转化（light ink/amber） ---- */
[data-scheme="b"] {
  --bg: #F7F8FB; --bg2: #FFFFFF; --panel: #FFFFFF;
  --panel2: #F2F4F9; --line: #E3E7F0; --line2: #D2D9E8;
  --fg: #101528; --fg2: #2C3550; --muted: #6B7690; --muted2: #9AA3B8;
  --acc: #B8860B; --acc2: #8A5A12; --acc-soft: #FBF3DE;
  --acc2c: #0E7C86; --acc2-soft: #E3F4F5;
  --warn: #C2600F; --ok: #15803D; --bad: #B91C1C;
  --glow: radial-gradient(760px 380px at 88% -4%, rgba(184, 134, 11, .10), transparent 62%);
  --card-bg: #FFFFFF;
  --head-bg: rgba(247, 248, 251, .82);
  --tag: #FBF3DE;
  --ash: 0 1px 2px rgba(16, 21, 40, .04), 0 10px 30px -18px rgba(16, 21, 40, .22);
}

/* ---- 方案 C：科学证据（light clinical blue） ---- */
[data-scheme="c"] {
  --bg: #FFFFFF; --bg2: #F4F8FC; --panel: #FFFFFF;
  --panel2: #F4F8FC; --line: #DCE6F0; --line2: #C4D5E6;
  --fg: #0B1A2B; --fg2: #26394F; --muted: #5B7185; --muted2: #93A6B8;
  --acc: #1E5F9E; --acc2: #0D3F73; --acc-soft: #E7F0F9;
  --acc2c: #256FB0; --acc2-soft: #E7F0F9;
  --warn: #B45309; --ok: #157F4B; --bad: #BE123C;
  --glow: radial-gradient(720px 360px at 8% -6%, rgba(30, 95, 158, .10), transparent 60%);
  --card-bg: #FFFFFF;
  --head-bg: rgba(255, 255, 255, .86);
  --tag: #E7F0F9;
  --ash: 0 1px 2px rgba(11, 26, 43, .04), 0 12px 32px -20px rgba(11, 26, 43, .26);
}

/* ---- 方案 D：投资人价值（dark navy/emerald） ---- */
[data-scheme="d"] {
  --bg: #06101A; --bg2: #0A1A26; --panel: rgba(255, 255, 255, .04);
  --panel2: rgba(255, 255, 255, .07); --line: rgba(255, 255, 255, .11);
  --line2: rgba(255, 255, 255, .2);
  --fg: #ECF6F4; --fg2: #B9D2CE; --muted: #7A938F; --muted2: #5B736F;
  --acc: #34E0A1; --acc2: #A8F5D6; --acc-soft: rgba(52, 224, 161, .13);
  --acc2c: #E9C158; --acc2-soft: rgba(233, 193, 88, .13);
  --warn: #FFB067; --ok: #34E0A1; --bad: #FF7385;
  --glow: radial-gradient(880px 440px at 14% -8%, rgba(52, 224, 161, .15), transparent 60%),
          radial-gradient(760px 400px at 88% 2%, rgba(233, 193, 88, .11), transparent 60%);
  --card-bg: linear-gradient(166deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .015));
  --head-bg: rgba(6, 16, 26, .74);
  --tag: rgba(52, 224, 161, .12);
}

/* ============================ 2. 基础 ============================ */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--f); font-size: 14px; line-height: 1.62;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
  background-image: var(--glow); background-repeat: no-repeat; background-attachment: fixed;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
h1, h2, h3, h4 { margin: 0; line-height: 1.22; letter-spacing: -.012em; font-weight: 700; }
h1 { font-size: 44px; letter-spacing: -.028em; }
h2 { font-size: 28px; }
h3 { font-size: 18px; }
h4 { font-size: 15px; font-weight: 650; }
p { margin: 0; }
hr { border: 0; border-top: 1px solid var(--line); margin: 0; }
sub, sup { font-size: .66em; }
::selection { background: var(--acc); color: #06101A; }

/* ============================ 3. 布局 ============================ */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }
.wrap-narrow { max-width: 1040px; margin: 0 auto; padding: 0 32px; }
section.band { padding: var(--sp9) 0; position: relative; }
section.band.tight { padding: var(--sp7) 0; }
section.band.tint { background: var(--bg2); }
section.band.hair { border-top: 1px solid var(--line); }
.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.g23 { grid-template-columns: 1.62fr 1fr; }
.g32 { grid-template-columns: 1fr 1.62fr; }
.g14 { grid-template-columns: 1fr 3fr; }
.flex { display: flex; }
.between { justify-content: space-between; }
.center { align-items: center; }
.wrapf { flex-wrap: wrap; }
.gap2 { gap: 8px; } .gap3 { gap: 12px; } .gap4 { gap: 16px; } .gap5 { gap: 24px; }
.col { display: flex; flex-direction: column; }
.mt2 { margin-top: 8px; } .mt3 { margin-top: 12px; } .mt4 { margin-top: 16px; }
.mt5 { margin-top: 24px; } .mt6 { margin-top: 32px; } .mt7 { margin-top: 48px; }
.mb2 { margin-bottom: 8px; } .mb3 { margin-bottom: 12px; } .mb4 { margin-bottom: 16px; }
.mb5 { margin-bottom: 24px; } .mb6 { margin-bottom: 32px; }
.tc { text-align: center; } .tr { text-align: right; }
.grow { flex: 1 1 auto; min-width: 0; }

/* ============================ 4. 顶栏 ============================ */
header.top {
  position: sticky; top: 0; z-index: 60; backdrop-filter: blur(18px) saturate(1.5);
  background: var(--head-bg); border-bottom: 1px solid var(--line);
}
.top-in { max-width: var(--maxw); margin: 0 auto; padding: 12px 32px; display: flex; align-items: center; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px; flex-shrink: 0; position: relative;
  background: linear-gradient(140deg, var(--acc), var(--acc2c));
  box-shadow: 0 6px 18px -6px var(--acc);
}
.brand-mark::before {
  content: ''; position: absolute; inset: 7px; border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, var(--acc2), var(--acc) 60%, transparent 72%);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .25);
}
.brand-txt b { display: block; font-size: 17px; font-weight: 750; letter-spacing: -.022em; line-height: 1.15; }
.brand-txt b sup { font-size: 9px; font-weight: 600; vertical-align: super; letter-spacing: 0; margin-left: 1px; }
.brand-txt span { display: block; font-size: 10px; color: var(--muted); letter-spacing: .02em; margin-top: 1px; white-space: nowrap; }
.brand-txt span sup { font-size: 7.5px; font-weight: 600; vertical-align: super; letter-spacing: 0; }
nav.main { display: flex; gap: 2px; flex-wrap: wrap; }
nav.main a {
  padding: 7px 12px; border-radius: 999px; font-size: 13px; color: var(--fg2);
  transition: .18s; white-space: nowrap;
}
nav.main a:hover { background: var(--panel2); color: var(--fg); }
nav.main a.on { background: var(--acc-soft); color: var(--acc); font-weight: 600; }
.top-cta { display: flex; gap: 8px; margin-left: auto; flex-shrink: 0; }

/* ---- 二级子菜单条 ---- */
.subnav {
  position: sticky; top: 59px; z-index: 55; background: var(--head-bg);
  backdrop-filter: blur(16px) saturate(1.4); border-bottom: 1px solid var(--line);
}
.subnav-in { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; display: flex; align-items: center; gap: 4px; overflow-x: auto; }
.subnav-in::-webkit-scrollbar { height: 0; }
.subnav a {
  padding: 11px 13px; font-size: 12.5px; color: var(--muted); white-space: nowrap;
  border-bottom: 2px solid transparent; transition: .16s;
}
.subnav a:hover { color: var(--fg); }
.subnav a.on { color: var(--acc); border-bottom-color: var(--acc); font-weight: 650; }
.subnav .subnav-label {
  font-size: 11px; font-weight: 700; letter-spacing: .08em; color: var(--acc);
  padding-right: 12px; margin-right: 6px; border-right: 1px solid var(--line2); white-space: nowrap;
}

/* ---- 面包屑 ---- */
.crumb { font-size: 11.5px; color: var(--muted2); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--acc); }
.crumb b { color: var(--acc); font-weight: 650; }

/* ---- 浏览器外框（用于展示内网产品界面） ---- */
.bframe { border: 1px solid var(--line2); border-radius: var(--r); overflow: hidden; background: var(--bg2);
  box-shadow: var(--ash-lg); }
.bframe-bar { display: flex; align-items: center; gap: 10px; padding: 9px 14px; border-bottom: 1px solid var(--line);
  background: var(--panel2); }
.bframe-bar .dots { display: flex; gap: 5px; flex-shrink: 0; }
.bframe-bar .dots i { width: 9px; height: 9px; border-radius: 50%; background: var(--line2); }
.bframe-bar .dots i:nth-child(1) { background: #F87171; }
.bframe-bar .dots i:nth-child(2) { background: #FBBF24; }
.bframe-bar .dots i:nth-child(3) { background: #34D399; }
.bframe-url {
  flex: 1; font-family: var(--fnum); font-size: 11.5px; color: var(--muted); background: var(--bg);
  border: 1px solid var(--line); border-radius: 999px; padding: 3px 12px; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap;
}
.bframe-body { padding: 0; }

/* ============================ 5. 按钮 / 徽标 ============================ */
.btn {
  display: inline-flex; align-items: center; gap: 7px; padding: 9px 16px; border-radius: 999px;
  font-size: 13px; font-weight: 600; border: 1px solid var(--line2); color: var(--fg);
  background: var(--panel2); cursor: pointer; transition: .18s; white-space: nowrap;
}
.btn:hover { border-color: var(--acc); color: var(--acc); }
.btn.pri {
  background: linear-gradient(135deg, var(--acc), var(--acc2c)); color: #FFFFFF; border-color: transparent;
  box-shadow: 0 8px 22px -10px var(--acc);
}
.btn.pri:hover { filter: brightness(1.06); color: #FFFFFF; }
.btn.lg { padding: 12px 22px; font-size: 14px; }
.btn.ghost { background: transparent; }

.pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600; background: var(--tag); color: var(--acc);
  border: 1px solid transparent; white-space: nowrap;
}
.pill.t2 { background: var(--acc2-soft); color: var(--acc2c); }
.pill.ok { background: var(--acc-soft); color: var(--acc); }
.pill.warn { background: rgba(255, 154, 90, .15); color: var(--warn); }
.pill.bad { background: rgba(255, 107, 122, .14); color: var(--bad); }
.pill.mut { background: var(--panel2); color: var(--muted); }
.pill.dot::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: currentColor; }
[data-scheme="b"] .pill.ok, [data-scheme="c"] .pill.ok { background: #E4F6EC; }
[data-scheme="b"] .pill.warn, [data-scheme="c"] .pill.warn { background: #FDF0E3; }
[data-scheme="b"] .pill.bad, [data-scheme="c"] .pill.bad { background: #FDE8EC; }

.eyebrow {
  font-size: 11.5px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--acc); display: flex; align-items: center; gap: 10px;
}
.eyebrow::before { content: ''; width: 22px; height: 1px; background: var(--acc); opacity: .6; }
.eyebrow.brand-case { text-transform: none; letter-spacing: .1em; }
.sec-h { max-width: 780px; margin-bottom: var(--sp6); }
.sec-h h2 { margin-bottom: 12px; }
.sec-h p { color: var(--muted); font-size: 15px; }
.lead { font-size: 17px; line-height: 1.68; color: var(--fg2); }
.mono { font-family: var(--fnum); font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.xs { font-size: 11.5px; }
.acc { color: var(--acc); }
.acc2 { color: var(--acc2c); }
.b { font-weight: 650; }
.strike { text-decoration: line-through; opacity: .5; }

/* ============================ 6. 卡片 ============================ */
.card {
  background: var(--card-bg); border: 1px solid var(--line); border-radius: var(--r);
  padding: 22px; position: relative; overflow: hidden;
}
.card.pad-lg { padding: 28px; }
.card.pad-sm { padding: 16px; }
.card.flat { background: var(--panel2); border-color: transparent; }
.card.glow { box-shadow: var(--agl); }
.card.hover { transition: .22s; }
.card.hover:hover { transform: translateY(-3px); border-color: var(--line2); box-shadow: var(--ash-lg); }
.card.acc-line::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--acc), var(--acc2c));
}
.card-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.card-h h3, .card-h h4 { margin: 0; }
.card-k { font-size: 11.5px; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; font-weight: 600; }

/* 指标块 */
.stat { }
.stat .v { font-family: var(--fnum); font-size: 34px; font-weight: 700; letter-spacing: -.03em; line-height: 1.06; }
.stat .v.sm { font-size: 25px; }
.stat .v .u { font-size: 14px; font-weight: 600; color: var(--muted); margin-left: 4px; letter-spacing: 0; }
.stat .k { font-size: 12.5px; color: var(--muted); margin-top: 5px; }
.stat .n { font-size: 11.5px; color: var(--muted2); margin-top: 3px; }

/* ============================ 7. 表格 ============================ */
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th {
  text-align: left; font-size: 11.5px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
  color: var(--muted); padding: 10px 12px; border-bottom: 1px solid var(--line2); white-space: nowrap;
}
.tbl td { padding: 11px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl tbody tr:hover { background: var(--panel2); }
.tbl td.num, .tbl th.num { font-family: var(--fnum); font-variant-numeric: tabular-nums; text-align: right; }
.tbl.tight td, .tbl.tight th { padding: 7px 10px; }
.tbl caption { caption-side: bottom; text-align: left; font-size: 11.5px; color: var(--muted2); padding-top: 8px; }

/* ============================ 8. 金团簇渲染件 ============================ */
.auc { position: relative; display: inline-block; }
.auc svg { overflow: visible; }
.auc-cap {
  position: absolute; left: 50%; bottom: -6px; transform: translateX(-50%);
  display: flex; gap: 10px; align-items: baseline; white-space: nowrap;
  background: var(--head-bg); backdrop-filter: blur(8px);
  border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px;
  font-family: var(--fnum); font-size: 11.5px;
}
.auc-cap-k { color: var(--acc); font-weight: 700; }
.auc-cap-v { color: var(--muted); }
.auc-slot { display: inline-block; }
.auc-stack { position: relative; height: 340px; display: flex; align-items: center; justify-content: center; }
.auc-stack .auc-slot { position: absolute; }
.auc-stack .auc-slot:nth-child(1) { transform: translateX(-46px); z-index: 3; }
.auc-stack .auc-slot:nth-child(2) { transform: translateX(26px) scale(.9); z-index: 2; }
.auc-stack .auc-slot:nth-child(3) { transform: translateX(74px) scale(.78); z-index: 1; }

/* 轨道 / 云图装饰 */
.orbits { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.orbits i {
  position: absolute; border: 1px solid var(--line); border-radius: 50%;
  left: 50%; top: 50%; transform: translate(-50%, -50%);
}
.orbits i:nth-child(1) { width: 380px; height: 380px; opacity: .5; }
.orbits i:nth-child(2) { width: 560px; height: 560px; opacity: .34; }
.orbits i:nth-child(3) { width: 780px; height: 780px; opacity: .2; }
.orbits i:nth-child(4) { width: 1040px; height: 1040px; opacity: .12; }

/* ============================ 9. 图表 ============================ */
.ds-bars { display: flex; flex-direction: column; gap: 7px; }
.ds-bar { display: grid; grid-template-columns: 94px 1fr 62px; align-items: center; gap: 10px; font-size: 12px; }
.ds-bars.compact .ds-bar { grid-template-columns: 74px 1fr 54px; }
.ds-bar-k { color: var(--muted); }
.ds-bar-track { height: 7px; border-radius: 99px; background: var(--panel2); overflow: hidden; }
.ds-bar-track i { display: block; height: 100%; border-radius: 99px; }
.ds-bar-v { font-family: var(--fnum); text-align: right; color: var(--fg2); font-variant-numeric: tabular-nums; }
.ds-radar { margin: 0 auto; }
.ds-spark { width: 100%; height: auto; }
.ds-funnel { display: flex; flex-direction: column; gap: 10px; }
.ds-fn-row { display: grid; grid-template-columns: 128px minmax(0, 1fr); gap: 14px; align-items: center; }
.ds-fn-side { font-size: 11.5px; color: var(--muted); }
.ds-fn-bar {
  border-radius: 8px; padding: 8px 12px; font-size: 11.5px; display: flex; align-items: center; gap: 8px;
  background: color-mix(in srgb, var(--fn-acc) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--fn-acc) 38%, transparent);
  color: var(--fg); text-align: right;
}
.ds-fn-bar b { font-family: var(--fnum); font-weight: 650; font-size: 11.5px; line-height: 1.35; }
.ds-fn-bar em { font-style: normal; font-size: 10.5px; color: var(--muted); line-height: 1.35; }
.ds-fn-tag { display: block; color: var(--acc2c); font-weight: 650; font-size: 11.5px; }
.ds-fn-note { display: block; font-size: 11px; color: var(--muted2); }
@media (max-width: 900px) { .ds-fn-row { grid-template-columns: 1fr; } }

/* 阶梯 / 瀑布 */
.ladder { display: flex; flex-direction: column; gap: 0; }
.ladder-row { display: grid; grid-template-columns: 130px 1fr 128px; gap: 16px; align-items: center;
  padding: 16px 0; border-top: 1px solid var(--line); }
.ladder-row:first-child { border-top: 0; }
.ladder-name { font-weight: 650; font-size: 13.5px; }
.ladder-bar { height: 30px; border-radius: 7px; background: var(--panel2); overflow: hidden; position: relative; }
.ladder-bar i { display: block; height: 100%; border-radius: 7px;
  background: linear-gradient(90deg, var(--acc), var(--acc2c)); opacity: .88; }
.ladder-bar span { position: absolute; inset: 0; display: flex; align-items: center; padding-left: 12px;
  font-family: var(--fnum); font-size: 12px; color: var(--fg); }
.ladder-val { text-align: right; font-family: var(--fnum); font-size: 13px; }
.ladder-val b { display: block; font-size: 15px; }

/* 时间轴 */
.tl { position: relative; padding-left: 28px; }
.tl::before { content: ''; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(180deg, var(--acc), var(--acc2c), transparent); opacity: .5; }
.tl-item { position: relative; padding-bottom: 26px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item::before { content: ''; position: absolute; left: -25px; top: 6px; width: 9px; height: 9px;
  border-radius: 50%; background: var(--acc); box-shadow: 0 0 0 3px var(--acc-soft); }
.tl-item.gate::before { background: var(--acc2c); box-shadow: 0 0 0 3px var(--acc2-soft); }
.tl-time { font-family: var(--fnum); font-size: 11.5px; color: var(--acc); font-weight: 650; letter-spacing: .03em; }

/* 流程步骤条 */
.steps { display: flex; gap: 0; align-items: stretch; overflow-x: auto; padding-bottom: 6px; }
.step {
  flex: 1 0 146px; padding: 16px 14px 18px; border: 1px solid var(--line); border-right: 0;
  background: var(--panel); position: relative; min-width: 146px;
}
.step:first-child { border-radius: var(--r) 0 0 var(--r); }
.step:last-child { border-radius: 0 var(--r) var(--r) 0; border-right: 1px solid var(--line); }
.step.on { background: var(--acc-soft); border-color: color-mix(in srgb, var(--acc) 44%, transparent); }
.step-n { font-family: var(--fnum); font-size: 11px; color: var(--acc); font-weight: 700; }
.step-t { font-size: 13px; font-weight: 650; margin: 6px 0 4px; }
.step-d { font-size: 11.5px; color: var(--muted); }
.step::after {
  content: ''; position: absolute; right: -7px; top: 50%; width: 12px; height: 12px; z-index: 2;
  transform: translateY(-50%) rotate(45deg); background: var(--bg);
  border-top: 1px solid var(--line); border-right: 1px solid var(--line);
}
.step:last-child::after { display: none; }
.step.on::after { background: color-mix(in srgb, var(--acc) 12%, var(--bg)); }

/* 层叠架构图 */
.stack { display: flex; flex-direction: column; gap: 8px; }
.stack-row {
  border: 1px solid var(--line); border-radius: var(--r-sm); padding: 12px 16px;
  display: grid; grid-template-columns: 62px 150px 1fr; gap: 16px; align-items: center;
  background: var(--card-bg);
}
.stack-row .id { font-family: var(--fnum); font-size: 12px; font-weight: 700; color: var(--acc); }
.stack-row .nm { font-size: 13px; font-weight: 650; }
.stack-row .it { display: flex; gap: 6px; flex-wrap: wrap; }
.stack-row .it span { font-size: 11px; padding: 2px 8px; border-radius: 6px; background: var(--panel2); color: var(--fg2); }
.stack-row.close { border-color: color-mix(in srgb, var(--acc2c) 40%, transparent); background: var(--acc2-soft); }

/* 门 / 检查项 */
.gate-card { border-left: 3px solid var(--acc); }
.gate-card.ok { border-left-color: var(--ok); }
.gate-card.bad { border-left-color: var(--bad); }

/* 徽标墙 */
.logos { display: flex; gap: 26px; flex-wrap: wrap; align-items: center; opacity: .78; }
.logos span { font-size: 12.5px; font-weight: 650; letter-spacing: .02em; color: var(--muted); }

/* 引文 */
.quote {
  border-left: 3px solid var(--acc); padding: 4px 0 4px 16px; color: var(--fg2);
  font-size: 13.5px; font-style: italic;
}
.cite { font-size: 11px; color: var(--muted2); }
.cite a { color: var(--acc2c); }

/* 残基热点标签 */
.hotspot { display: flex; gap: 6px; flex-wrap: wrap; }
.hotspot span {
  font-family: var(--fnum); font-size: 11.5px; padding: 3px 9px; border-radius: 6px;
  background: var(--acc-soft); color: var(--acc); border: 1px solid var(--line);
}

/* 图标块 */
.cap-icon {
  width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: var(--acc-soft); color: var(--acc); font-size: 16px; font-weight: 700;
  flex-shrink: 0; font-family: var(--fnum);
}

/* 阶段/里程碑小工具 */
.stagetbl td:first-child { width: 92px; white-space: nowrap; }
.ok-mark { color: var(--ok); font-weight: 700; }
.no-mark { color: var(--bad); font-weight: 700; }
.mid-mark { color: var(--warn); font-weight: 700; }

/* 图例 */
.legend { display: flex; gap: 16px; flex-wrap: wrap; font-size: 11.5px; color: var(--muted); }
.legend i { display: inline-block; width: 9px; height: 9px; border-radius: 3px; margin-right: 5px; }

/* 装饰网格底纹 */
.gridbg {
  position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(720px 420px at 50% 0%, #000, transparent 72%);
  -webkit-mask-image: radial-gradient(720px 420px at 50% 0%, #000, transparent 72%);
}

/* 数值区间条（价格区间可视化） */
.range-bar { position: relative; height: 8px; border-radius: 99px; background: var(--panel2); }
.range-bar i { position: absolute; height: 100%; border-radius: 99px;
  background: linear-gradient(90deg, var(--acc), var(--acc2c)); }
.range-ax { display: flex; justify-content: space-between; font-family: var(--fnum); font-size: 10.5px;
  color: var(--muted2); margin-top: 6px; }

/* 折叠 / 详情 */
details.acc-d { border: 1px solid var(--line); border-radius: var(--r-sm); padding: 12px 16px; background: var(--panel); }
details.acc-d summary { cursor: pointer; font-size: 13px; font-weight: 620; list-style: none; }
details.acc-d summary::-webkit-details-marker { display: none; }
details.acc-d summary::before { content: '＋ '; color: var(--acc); font-weight: 700; }
details.acc-d[open] summary::before { content: '－ '; }
details.acc-d > *:not(summary) { margin-top: 11px; }

/* 底部 */
footer.ft { border-top: 1px solid var(--line); padding: 44px 0 34px; margin-top: 0; background: var(--bg2); }
.ft-in { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; display: grid;
  grid-template-columns: 1.9fr 1fr 1fr 1fr; gap: 32px; }
.ft h4 { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.ft ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 7px; }
.ft li { font-size: 12.5px; color: var(--fg2); }
.ft-bottom { max-width: var(--maxw); margin: 32px auto 0; padding: 18px 32px 0;
  border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px;
  font-size: 11.5px; color: var(--muted2); flex-wrap: wrap; }
.ft-bottom a.icp { color: var(--muted2); text-decoration: none; border-bottom: 1px dotted var(--line2); padding-bottom: 1px; }
.ft-bottom a.icp:hover { color: var(--acc); border-bottom-color: var(--acc); }

/* 演示水印 */
.demo-flag {
  position: fixed; right: 18px; bottom: 18px; z-index: 80;
  background: var(--head-bg); backdrop-filter: blur(12px); border: 1px solid var(--line2);
  border-radius: 999px; padding: 7px 14px; font-size: 11.5px; color: var(--muted);
  display: flex; align-items: center; gap: 8px; box-shadow: var(--ash);
}
.demo-flag b { color: var(--acc); font-weight: 700; }

/* 方案切换器（多方案对比用） */
.scheme-switch { display: flex; gap: 6px; align-items: center; }
.scheme-switch a {
  width: 26px; height: 26px; border-radius: 8px; border: 1px solid var(--line2);
  display: grid; place-items: center; font-size: 11px; font-weight: 700; color: var(--muted);
}
.scheme-switch a.on { border-color: var(--acc); color: var(--acc); background: var(--acc-soft); }

/* ============================ 10. 动画 ============================ */
[data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .6s cubic-bezier(.2, .7, .3, 1), transform .6s cubic-bezier(.2, .7, .3, 1); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal][data-d="1"] { transition-delay: .07s; }
[data-reveal][data-d="2"] { transition-delay: .14s; }
[data-reveal][data-d="3"] { transition-delay: .21s; }
[data-reveal][data-d="4"] { transition-delay: .28s; }
[data-reveal][data-d="5"] { transition-delay: .35s; }
[data-reveal][data-d="6"] { transition-delay: .42s; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ============================ 11. 响应式 ============================ */
@media (max-width: 1120px) {
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g5 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .g23, .g32, .ft-in { grid-template-columns: 1fr; }
  nav.main { display: none; }
}
@media (max-width: 820px) {
  h1 { font-size: 32px; } h2 { font-size: 23px; }
  .wrap, .wrap-narrow, .top-in, .ft-in, .ft-bottom { padding-left: 18px; padding-right: 18px; }
  .g2, .g3, .g4, .g5 { grid-template-columns: 1fr; }
  section.band { padding: 56px 0; }
  .stack-row { grid-template-columns: 46px 1fr; }
  .stack-row .it { grid-column: 1 / -1; }
  .ladder-row { grid-template-columns: 100px 1fr; }
  .ladder-val { grid-column: 2; text-align: left; }
}